天然次生林林木空间格局及更新格局

摘要应用红外测距仪和经纬仪对样地的每株乔木及幼树进行了测量，并建立了地理信息数据库。分析发现：天然次生林乔木种群结构与幼树结构非常一致，说明这一群落结构是稳定的；乔木及幼树的空间格局均为集聚格局，幼树集聚性比乔木集取性高得多，表明林木空间格局是从高集聚趋向于随机格局的过程。同时还利用更新联结度的概念进行了分析：紫椴和蒙古栎更适合于在本树种的树下更新，其它树种更适合于在非本树种的树下更新。

The Spatial Pattern and Renewal Pattern in Natural Secondary Forest

The every arbor and yang tree in sample plots was measured with infrared distance meter (RED2L) and transit, and the geo-database was built. It was discovered that the population structure of the arbors is very similar to that of the yang trees, which indicates that the architecture of plant community is steady. The patterns of the arbors and yang trees are convergent and the yang trees are more convergent than the arbors, which indicate that the forest pattern is developing to random pattern from very convergent pattern. The new concept of renewal interspecific association was put forward, with which all of the trees in the sample plot was analyzed, which concluded that Tilia amurensis and Quercus mongolica compatibly renew under the arbors of the same specie and other species are propitious to renew under other species.